Unit 8 Probability Review

Which best describes the probability of the arrow on this spinner landing on green or orange?

• certain

• impossible

• more likely

• less likely

The probability of an event is 0 (zero). Which word best describes this event?

• certain

• impossible

• likely

• unlikely

Joe claims that a probability of 0.5 means that an even is likely to occur. Is Joe correct?

• Yes. A probability greater than or equal to 1/2 means the event is likely to occur.

• No. A probability if 1/2 means the event is neither likely nor unlikely to occur.

• Yes. Any probability greater than 0 (zero) means the vent is likely to occur.

• No. Any probability less than 1 means the even is possible.

An event occurring has a probability of 0.25. What is the likelihood of the event happening?

• The event is likely to occur.

• The event is impossible.

• The event is unlikely to occur.

• The event is certain.

Helen tosses a coin 40 times, and it lands on heads 22 times and tails 18 times. What is the probability of landing on tails?

• 55%

• 81%

• 33%

• 45%

Milissa is using a fair spinner with 4 (four) equally sized sections as shown. She spins the spinner 45 times. What is the best prediction of the number of times the arrow lands on the section labeled "2"?

• exactly 45 times

• exactly 11 times

• between 1 and 4 times

• between 11 and 12 times

The spinner is divided into 10 (ten) congruent sections. Lynn spins the spinner 90 times, and it lands on the gray section 7 times. How many more times should Lynn have expected the spinner to land in the gray section?

• 3

• 9

• 2

• 45

Garrett tosses a fair coin 30 times. The coin lands on tails 12 times and heads 18 times. What is the probability of the coin landing on tails?

• The experimental probability of landing on tails is 50%, while the theoretical probability is 40%

• The experimental probability of landing on tails is 40%, while the theoretical probability is 50%

• The experimental probability of landing on tails is 60%, while the theoretical probability is 50%

• The experimental probability of landing on tails is 50%, while the theoretical probability is 60%

There are 4 colors of M&Ms in a bowl: green, red, brown, and orange. If the probability of getting a green is 2/5, red is 1/10, and brown is 3/10, what is the probability of getting orange?

• 0

• 1/10

• 1

• 1/5

How many outcomes are possible when tossing a coin and rolling a six-sided number cube simultaneously?

• 12

• 6

• 1/6

• 1/12